package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Slf4j
@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品，同时插入菜品对应的数据，需要操作两张表：dish、dish_flavor
     *
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlower(DishDTO dishDTO) {
        log.info("开始处理菜品数据：{}", dishDTO);
        Dish dish = new Dish();
        // 对象拷贝
        BeanUtils.copyProperties(dishDTO, dish);
        // 插入一条数据
        dishMapper.insert(dish);

        // 获取插入的菜品的id
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {

            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            // 批量插入
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        log.info("开始进行分页查询：{}", dishPageQueryDTO);
        // 开始分页查询
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        // 调用mapper分页查询
        Page<DishVO> page= dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除菜品
     *
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        // 判断当前菜品是否能够删除 --- 是否存在起售中的菜品
        for (Long id : ids) {
            // 查询当前菜品是否在售
           Dish dish =dishMapper.getById(id);
           if(dish.getStatus() == StatusConstant.ENABLE){
               // 处于起售中，不能删除
               throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
           }
        }
       //判断当前菜品是否能够删除 --- 是否被套餐关联
        List<Long>setmealIds = setmealDishMapper.getSetmealIdByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0){
            //当前菜品被套餐关联，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

//       //删除菜品表中的菜品数据
//        for (Long id : ids) {
//            dishMapper.deleteByIds(id);
//            //删除菜品关联的口味数据
//            dishFlavorMapper.deleteByDishId(id);
//
//        }
        //根据菜品集合批量删除菜品数据
        log.info("批量删除菜品：{}", ids);
        dishMapper.deleteBatch(ids);

        //根据菜品集合批量删除菜品口味数据
        log.info("批量删除菜品口味：{}", ids);
        dishFlavorMapper.deleteByDishIds(ids);


    }
    /**
     * 根据id查询菜品和对应的口味数据
     *
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        // 组装VO数据并返回
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);


        return dishVO;
    }

    @Override
    public void updateWithFlower(DishDTO dishDTO) {
        log.info("修改菜品：{}",dishDTO);
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
        log.info("修改菜品成功");
        log.info("修改菜品口味成功");
        log.info("修改成功");


    }

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 根据分类id查询菜品
     *
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }
        return dishVOList;
    }
}
